Prince's Plume
Stanleya pinnata

Family: Mustard (Brassicaceae)
AKA: Desert Plume, Desert Prince's Plume
Photo taken on: May 20, 2012
Location: Moqui Dugway, AZ
Life Zones: Plains to foothills
Habitat: Dry areas, deserts, gravelly slopes

Grows to 4ft tall with stout woody stems. Flowers grow in spikes to 12" long with long stamens.

Flora of North America reference.